CHICAGO—Two Chicago police officers were shot and wounded Friday by a gunman who dropped a handgun while waiting in line at an outdoor hot dog stand with one of the officers, picked it up and opened fire, police said. The suspected gunman was captured blocks away by officers and taken into custody. The wounded officers were rushed to a hospital and one of them, who suffered a grazing wound to his head, was released later in the morning, Chicago Police Superintendent David Brown told reporters. He said the other officer, who was shot in the leg, was hospitalized but police have described his injuries as non-life-threatening. Police did not immediately have information about the suspected gunman or possible charges, but Chief of Detectives Brendan Deenihan said he was expected to be charged with attempted murder of a police officer. The shooting happened around 3:30 a.m. at the Original Maxwell Street …